The changes of color change time (t_c) of standard methyl-violet test paper and stabilizer content in propellants in the standard methyl-violet test at 134.5 ℃ for three single-base (SB) propellants and at 120 ℃ for three double-base propellants and one triple-base propellant aged at 85 ℃ with ageing time (t_a) of the propellants are determined by heat test and chemical analysis method. The data of the t_c vs t_a relationship obtained are analyzed by variance test. The results show that the t_c vs t_a relationship is obvious for SB propellants and is not obvious for DB- and TB-propellants, which indicate that the methyl-violet test is not suitable for rating the stability of DB and TB-propellants.